Tieu,There is a difference between "never tried" and "try, but does not work".Return to your families.Your wife is waiting for you at home.You have only 1.5 years.Time passed quickly.
Or,This is a different "not hard" and "hard, but not to do".Go back to your home.Your wife is waiting for you at home.You only have 1.5 years left.Time passes quickly.